Etude théorique de la double ionisation de la couche L et K du béryllium par impact d'électrons rapides

Abstract : The document presents a theoretical study of the L shell and K shell double ionization of beryllium by fast electrons, with the coincidence detection of the emerging particles, which represents one of the main tools to probe electron-electron correlation and to observe the mechanisms of the double ionization process. The determination of the fully differential cross section is presented in the frame of a procedure using the first term of the Born series representing the interaction between the incident electron and the target. All the electrons are taken into account. They are described by different more or less correlated wave functions for the bound electrons in the initial and final states, and for the double continuum of the two ejected electrons for which, the well known 3C function is applied. An important part of the document is devoted to the presentation of the results concerning the variation of the fully differential cross section in terms of the different experimental conditions and with different wave functions. This permits to analyse the mechanisms of this complex quantum process and the effect of the initial and final states correlation.
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Marie Becher. Etude théorique de la double ionisation de la couche L et K du béryllium par impact d'électrons rapides. Autre [cond-mat.other]. Université Paul Verlaine - Metz, 2008. Français. ⟨NNT : 2008METZ035S⟩. ⟨tel-01752602⟩

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